Flexible hinge and removable attachment

ABSTRACT

Flexible hinge and removable attachment techniques are described. In one or more implementations, a flexible hinge is configured to communicatively and physically couple an input device to a computing device and may implement functionality such as a support layer and minimum bend radius. The input device may also include functionality to promote a secure physical connection between the input device and the computing device. One example of this includes use of one or more protrusions that are configured to be removed from respective cavities of the computing device along a particular axis but mechanically bind along other axes. Other techniques include use of a laminate structure to form a connection portion of the input device.

This application claims priority under 35 U.S.C. §119(e) to the following U.S. Provisional Patent Applications, the entire disclosures of each of these applications being incorporated by reference in their entirety:

U.S. Provisional Patent Application No. 61/606,321, filed Mar. 2, 2012, and titled “Screen Edge;”

U.S. Provisional Patent Application No. 61/606,301, filed Mar. 2, 2012, and titled “Input Device Functionality;”

U.S. Provisional Patent Application No. 61/606,313, filed Mar. 2, 2012, and titled “Functional Hinge;”

U.S. Provisional Patent Application No. 61/606,333, filed Mar. 2, 2012, and titled “Usage and Authentication;”

U.S. Provisional Patent Application No. 61/613,745, filed Mar. 21, 2012, and titled “Usage and Authentication;”

U.S. Provisional Patent Application No. 61/606,336, filed Mar. 2, 2012, and titled “Kickstand and Camera;” and

U.S. Provisional Patent Application No. 61/607,451, filed Mar. 6, 2012, and titled “Spanaway Provisional;”

and further this application incorporates the following application by reference in its entirety, U.S. patent application Ser. No. 13/471,282, filed May 14, 2012, and titled “Input Device Assembly.”

BACKGROUND

Mobile computing devices have been developed to increase the functionality that is made available to users in a mobile setting. For example, a user may interact with a mobile phone, tablet computer, or other mobile computing device to check email, surf the web, compose texts, interact with applications, and so on.

Because mobile computing devices are configured to be mobile, however, the devices may be exposed to a wide variety of environments having varying degrees of safety for the computing device. Accordingly, devices were developed to help protect the mobile computing devices from their environment. However, conventional techniques to install and remove the devices from the computing device alternated between being difficult to remove but providing good protection or being relatively easy to remove but providing limited protection.

SUMMARY

Flexible hinge and removable attachment techniques are described. In one or more implementations, a flexible hinge is configured to communicatively and physically couple an input device to a computing device. The flexible hinge may be configured to support movement of the input device similar to a cover of a book, such that the input device may act as a cover. Flexibility of the hinge may be implemented using a variety of techniques, such as a support layer to add strength to the device to protect components from repeated connection and removal from the computing device, e.g., conductors used for communication.

The hinge may also be configured to provide a minimum bend radius to further protect these conductors and other components. A variety of different techniques may be employed, such as use of embossing, a mid-spine, material choice, and so on. Additionally, techniques may be leveraged to provide mechanical stiffness to a connection portion that is used to connect the input device to the computing device, such as to form a laminate structure through the use of pins.

The input device may also include functionality to promote a secure physical connection between the input device and the computing device. One example of this includes use of one or more protrusions that are configured to be removed from respective cavities of the computing device along a particular axis but mechanically bind along other axes. These protrusions may also be used for a variety of other purposes, such as to transmit power or communications between the devices.

This Summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

BRIEF DESCRIPTION OF THE DRAWINGS

The detailed description is described with reference to the accompanying figures. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The use of the same reference numbers in different instances in the description and the figures may indicate similar or identical items. Entities represented in the figures may be indicative of one or more entities and thus reference may be made interchangeably to single or plural forms of the entities in the discussion.

FIG. 1 is an illustration of an environment in an example implementation that is operable to employ the techniques described herein.

FIG. 2 depicts an example implementation of an input device of FIG. 1 as showing a flexible hinge in greater detail.

FIG. 3 depicts an example orientation of the input device in relation to the computing device as covering a display device of the computing device.

FIG. 4 depicts an example orientation of the input device in relation to the computing device as assuming a typing orientation.

FIG. 5 depicts an example orientation of the input device in relation to the computing device as covering a rear housing of the computing device and exposing a display device of the computing device.

FIG. 6 depicts an example orientation of the input device as including a portion configured to cover a rear of the computing device, which in this instance is used to support a kickstand of the computing device.

FIG. 7 depicts an example orientation in which the input device including the portion of FIG. 6 are used to cover both the front and back of the computing device.

FIG. 8 depicts an example implementation showing a perspective view of a connection portion of FIG. 2 that includes mechanical coupling protrusions and a plurality of communication contacts.

FIG. 9 depicts a cross section taken along an axis showing a communication contact as well as a cross section of a cavity of the computing device in greater detail.

FIG. 10 depicts a cross section of the computing device, connection portion, and flexible hinge of the input device as being oriented as shown in FIG. 3 in which the input device acts as a cover for a display device of the computing device.

FIG. 11 depicts a cross section taken along an axis showing a magnetic coupling device as well as a cross section of the cavity of the computing device in greater detail.

FIG. 12 depicts an example of a magnetic coupling portion that may be employed by the input device or computing device to implement a flux fountain.

FIG. 13 depicts another example of a magnetic coupling portion that may be employed by the input device or computing device to implement a flux fountain.

FIG. 14 depicts a cross section taken along an axis showing a mechanical coupling protrusion as well as a cross section of the cavity of the computing device in greater detail.

FIG. 15 depicts a perspective view of a protrusion as configured to communicate signals and/or transmit power between the input device and the computing device.

FIG. 16 illustrates a top view of a protrusion in which a surface is divided to support a plurality of different contacts.

FIG. 17 depicts a cross section view of the protrusion of FIG. 16 as disposed within a cavity of the computing device.

FIG. 18 depicts an example implementation showing a support layer that is configured to support operation of the flexible hinge as well as protect components of the input device during this operation.

FIG. 19 depicts an example implementation in which a top view of the connection portion is shown.

FIG. 20 depicts a cross section view of the connection portion of FIG. 19.

FIG. 21 depicts an example cross sectional view of a first pin of FIG. 20 as securing a metal spine to plastic of the connection portion to form a laminate structure.

FIG. 22 illustrates an example system including various components of an example device that can be implemented as any type of computing device as described with reference to FIGS. 1-21 to implement embodiments of the techniques described herein.

DETAILED DESCRIPTION

Overview

A variety of different devices may be physically attached to a mobile computing device to provide a variety of functionality. For example, a device may be configured to provide a cover for at least a display device of the computing device to protect it against harm. Other devices may also be physically attached to the mobile computing device, such as an input device (e.g., keyboard having a track pad) to provide inputs to the computing device. Further, functionality of these devices may be combined, such as to provide a combination cover and input device. However, conventional techniques that were utilized to attach devices to the computing device may alternate between significant protection and corresponding complications in installing and removing the device to limited protection but having relative ease of installation and removal.

Techniques are described herein to removably and/or flexibly connect an input device or other device (e.g., a cover) with a computing device. These techniques include use of a flexible hinge to promote rotational movement similar to that of a book. Techniques may also be employed to protect components of the input device during this movement, such as to support a minimum bend radius to protect conductors of the input device from the flexible movement. These techniques may include material selection, use of a mid-spine, a support layer, and so on.

Techniques are also described to promote a secure physical coupling between the input device and the computing device. This may include use of one or more protrusions that are configured to be engaged in respective cavities of the computing device, or vice versa. The protrusions are configured to mechanically bind within the cavities when the input device is “pulled away” from the computing device along one or more axes, but permit removal along a particular axis. In this way, the input device may have a secure connection through a wide range of movement yet still support ease of removal.

Techniques are also described to promote mechanical stiffness of a connection portion that is to be used to connect the input device to the computing device. The connection portion, for instance, may include a projection formed of plastic to be disposed within a channel of the computing device, or vice versa. A spine, such as a strip of metal (e.g., aluminum), may be secured to the projection to increase the mechanical stiffness. This securing may be performed through use a plurality of pins such that a combination of the pins, spine, and projection may form a laminate structure having increased stiffness along an axis of the spine. Further, the pins may be used to support a variety of other functionality, such as to attach the spine to the projection while an adhesive (e.g., an epoxy) sets, thereby supporting a fast production cycle time that is not limited by the amount of time used to have the adhesive set. Once set, a combination of the adhesive and the pins may further promote mechanical stiffness of the connection portion. Further discussion of these and other techniques may be found in relation to the following sections.

In the following discussion, an example environment is first described that may employ the techniques described herein. Example procedures are then described which may be performed in the example environment as well as other environments. Consequently, performance of the example procedures is not limited to the example environment and the example environment is not limited to performance of the example procedures. Further, although an input device is described, other devices are also contemplated that do not include input functionality, such as covers. For example, these techniques are equally applicable to passive devices, e.g., a cover having one or more materials (e.g., magnets, ferrous material, and so on) that are configured and positioned within the cover to be attracted to magnetic coupling devices of the computing device, use of protrusions and connecting portion, and so on as further described below.

Example Environment

FIG. 1 is an illustration of an environment 100 in an example implementation that is operable to employ the techniques described herein. The illustrated environment 100 includes an example of a computing device 102 that is physically and communicatively coupled to an input device 104 via a flexible hinge 106. The computing device 102 may be configured in a variety of ways. For example, the computing device 102 may be configured for mobile use, such as a mobile phone, a tablet computer as illustrated, and so on. Thus, the computing device 102 may range from full resource devices with substantial memory and processor resources to a low-resource device with limited memory and/or processing resources. The computing device 102 may also relate to software that causes the computing device 102 to perform one or more operations.

The computing device 102, for instance, is illustrated as including an input/output module 108. The input/output module 108 is representative of functionality relating to processing of inputs and rendering outputs of the computing device 102. A variety of different inputs may be processed by the input/output module 108, such as inputs relating to functions that correspond to keys of the input device 104, keys of a virtual keyboard displayed by the display device 110 to identify gestures and cause operations to be performed that correspond to the gestures that may be recognized through the input device 104 and/or touchscreen functionality of the display device 110, and so forth. Thus, the input/output module 108 may support a variety of different input techniques by recognizing and leveraging a division between types of inputs including key presses, gestures, and so on.

In the illustrated example, the input device 104 is configured as having an input portion that includes a keyboard having a QWERTY arrangement of keys and track pad although other arrangements of keys are also contemplated. Further, other non-conventional configurations are also contemplated, such as a game controller, configuration to mimic a musical instrument, and so forth. Thus, the input device 104 and keys incorporated by the input device 104 may assume a variety of different configurations to support a variety of different functionality.

As previously described, the input device 104 is physically and communicatively coupled to the computing device 102 in this example through use of a flexible hinge 106. The flexible hinge 106 is flexible in that rotational movement supported by the hinge is achieved through flexing (e.g., bending) of the material forming the hinge as opposed to mechanical rotation as supported by a pin, although that embodiment is also contemplated. Further, this flexible rotation may be configured to support movement in one or more directions (e.g., vertically in the figure) yet restrict movement in other directions, such as lateral movement of the input device 104 in relation to the computing device 102. This may be used to support consistent alignment of the input device 104 in relation to the computing device 102, such as to align sensors used to change power states, application states, and so on.

The flexible hinge 106, for instance, may be formed using one or more layers of fabric and include conductors formed as flexible traces to communicatively couple the input device 104 to the computing device 102 and vice versa. This communication, for instance, may be used to communicate a result of a key press to the computing device 102, receive power from the computing device, perform authentication, provide supplemental power to the computing device 102, and so on. The flexible hinge 106 may be configured in a variety of ways, further discussion of which may be found in relation to the following figure.

FIG. 2 depicts an example implementation 200 of the input device 104 of FIG. 1 as showing the flexible hinge 106 in greater detail. In this example, a connection portion 202 of the input device is shown that is configured to provide a communicative and physical connection between the input device 104 and the computing device 102. The connection portion 202 as illustrated has a height and cross section configured to be received in a channel in the housing of the computing device 102, although this arrangement may also be reversed without departing from the spirit and scope thereof.

The connection portion 202 is flexibly connected to a portion of the input device 104 that includes the keys through use of the flexible hinge 106. Thus, when the connection portion 202 is physically connected to the computing device the combination of the connection portion 202 and the flexible hinge 106 supports movement of the input device 104 in relation to the computing device 102 that is similar to a hinge of a book.

Through this rotational movement, a variety of different orientations of the input device 104 in relation to the computing device 102 may be supported. For example, rotational movement may be supported by the flexible hinge 106 such that the input device 104 may be placed against the display device 110 of the computing device 102 and thereby act as a cover as shown in the example orientation 300 of FIG. 3. Thus, the input device 104 may act to protect the display device 110 of the computing device 102 from harm.

As shown in the example orientation 400 of FIG. 4, a typing arrangement may be supported. In this orientation, the input device 104 is laid flat against a surface and the computing device 102 is disposed at an angle to permit viewing of the display device 110, e.g., such as through use of a kickstand 402 disposed on a rear surface of the computing device 102.

In the example orientation 500 of FIG. 5, the input device 104 may also be rotated so as to be disposed against a back of the computing device 102, e.g., against a rear housing of the computing device 102 that is disposed opposite the display device 110 on the computing device 102. In this example, through orientation of the connection portion 202 to the computing device 102, the flexible hinge 106 is caused to “wrap around” the connection portion 202 to position the input device 104 at the rear of the computing device 102.

This wrapping causes a portion of a rear of the computing device 102 to remain exposed. This may be leveraged for a variety of functionality, such as to permit a camera 502 positioned on the rear of the computing device 102 to be used even though a significant portion of the rear of the computing device 102 is covered by the input device 104 in this example orientation 500. Although configuration of the input device 104 to cover a single side of the computing device 102 at any one time was described above, other configurations are also contemplated.

In the example orientation 600 of FIG. 6, the input device 104 is illustrated as including a portion 602 configured to cover a rear of the computing device. This portion 602 is also connected to the connection portion 202 using a flexible hinge 604.

The example orientation 600 of FIG. 6 also illustrates a typing arrangement in which the input device 104 is laid flat against a surface and the computing device 102 is disposed at an angle to permit viewing of the display device 110. This is supported through use of a kickstand 402 disposed on a rear surface of the computing device 102 to contact the portion 602 in this example.

FIG. 7 depicts an example orientation 700 in which the input device 104 including the portion 602 are used to cover both the front (e.g., display device 110) and back (e.g., opposing side of the housing from the display device) of the computing device 102. In one or more implementations, electrical and other connectors may also be disposed along the sides of the computing device 102 and/or the input device 104, e.g., to provide auxiliary power when closed.

Naturally, a variety of other orientations are also supported. For instance, the computing device 102 and input device 104 may assume an arrangement such that both are laid flat against a surface as shown in FIG. 1. Other instances are also contemplated, such as a tripod arrangement, meeting arrangement, presentation arrangement, and so forth.

Returning again to FIG. 2, the connection portion 202 is illustrated in this example as including magnetic coupling devices 204, 206, mechanical coupling protrusions 208, 210, and a plurality of communication contacts 212. The magnetic coupling devices 204, 206 are configured to magnetically couple to complementary magnetic coupling devices of the computing device 102 through use of one or more magnets. In this way, the input device 104 may be physically secured to the computing device 102 through use of magnetic attraction.

The connection portion 202 also includes mechanical coupling protrusions 208, 210 to form a mechanical physical connection between the input device 104 and the computing device 102. The mechanical coupling protrusions 208, 210 are shown in greater detail in relation to FIG. 8, which is discussed below.

FIG. 8 depicts an example implementation 800 showing a perspective view of the connection portion 202 of FIG. 2 that includes the mechanical coupling protrusions 208, 210 and the plurality of communication contacts 212. As illustrated, the mechanical coupling protrusions 208, 210 are configured to extend away from a surface of the connection portion 202, which in this case is perpendicular although other angles are also contemplated.

The mechanical coupling protrusions 208, 210 are configured to be received within complementary cavities within the channel of the computing device 102. When so received, the mechanical coupling protrusions 208, 210 promote a mechanical binding between the devices when forces are applied that are not aligned with an axis that is defined as correspond to the height of the protrusions and the depth of the cavity, further discussion of which may be found in relation to FIG. 14.

The connection portion 202 is also illustrated as including a plurality of communication contacts 212. The plurality of communication contacts 212 is configured to contact corresponding communication contacts of the computing device 102 to form a communicative coupling between the devices as shown and discussed in greater detail in relation to the following figure.

FIG. 9 depicts a cross section taken along an axis 900 of FIGS. 2 and 8 showing one of the communication contacts 212 as well as a cross section of a cavity of the computing device 102 in greater detail. The connection portion 202 is illustrated as including a projection 902 that is configured to be complementary to a channel 904 of the computing device 102, e.g., having complimentary shapes, such that movement of the projection 902 within the cavity 904 is limited.

The communication contacts 212 may be configured in a variety of ways. In the illustrated example, the communication contact 212 of the connection portion 202 is formed as a spring loaded pin 906 that is captured within a barrel 908 of the connection portion 202. The spring loaded pin 906 is biased outward from the barrel 908 to provide a consistent communication contact between the input device 104 and the computing device 102, such as to a contact 910 of the computing device 102. Therefore, contact and therefore communication may be maintained during movement or jostling of the devices. A variety of other examples are also contemplated, including placement of the pins on the computing device 102 and contacts on the input device 104.

The flexible hinge 106 is also shown in greater detail in the example of FIG. 9. The flexible hinge 106 in this cross section includes a conductor 912 that is configured to communicatively coupled the communication contact 212 of the connection portion 202 with an input portion 914 of the input device 104, e.g., one or more keys, a track pad, and so forth. The conductor 912 may be formed in a variety of ways, such as a copper trace that has an operational flexibility to permit operation as part of the flexible hinge, e.g., to support repeated flexing of the hinge 106. Flexibility of the conductor 912, however, may be limited, e.g., may remain operational to conduct signals for flexing that is performed above a minimum bend radius.

Accordingly, the flexible hinge 106 may be configured to support a minimum bend radius based on the operational flexibility of the conductor 912 such that the flexible hinge 106 resists flexing below that radius. A variety of different techniques may be employed. The flexible hinge 106, for instance, may be configured to include first and second outer layers 916, 918, which may be formed from a fabric, microfiber cloth, and so on. Flexibility of material used to form the first and/or second outer layers 916, 918 may be configured to support flexibility as described above such that the conductor 912 is not broken or otherwise rendered inoperable during movement of the input portion 914 in relation to the connection portion 202.

In another instance, the flexible hinge 106 may include a mid-spine 920 located between the connection portion 202 and the input portion 914. The mid-spine 920, for example, includes a first flexible portion 922 that flexible connects the input portion 904 to the mid-spine 920 and a second flexible portion 924 that flexible connects the mid-spine 920 to the connection portion 920.

In the illustrated example, the first and second outer layers 916, 918 extend from the input portion 914 (and act as a cover thereof) through the first and second flexible portions 922, 924 of the flexible hinge 106 and are secured to the connection portion 202, e.g., via clamping, adhesive, and so on. The conductor 912 is disposed between the first and second outer layers 916, 918. The mid-spine 920 may be configured to provide mechanical stiffness 926 to a particular location of the flexible hinge 106 to support a desired minimum bend radius, further discussion of which may be found in relation to the following figure.

FIG. 10 depicts a cross section of the computing device 102, connection portion 202 and flexible hinge 106 of the input device 104 as being oriented as shown in FIG. 3 in which the input device 104 acts as a cover for a display device 110 of the computing device 102. As illustrated, this orientation causes the flexible hinge 106 to bend. Through inclusion of the mid-spine 920 and sizing of the first and second flexible portions 922, 924, however, the bend does not exceed an operational bend radius of the conductor 912 as previously described. In this way, the mechanical stiffness 926 provided by the mid-spine 920 (which is greater than a mechanical stiffness of other portions of the flexible hinge 106) may protect the conductors 912.

The mid-spine 920 may also be used to support a variety of other functionality. For example, the mid-spine 920 may support movement along a longitudinal axis as shown in FIG. 1 yet help restrict movement along a latitudinal axis that otherwise may be encountered due to the flexibility of the flexible hinge 106.

Other techniques may also be leveraged to provide desired flexibility at particular points along the flexible hinge 106. For example, embossing may be used in which an embossed area, e.g., an area that mimics a size and orientation of the mid-spine 920, is configured to increase flexibility of a material, such as one or more of the first and second outer layers 916, 918, at locations that are embossed. An example of an embossed line 214 that increases flexibility of a material along a particular axis is shown in FIG. 2. It should be readily apparent, however, that a wide variety of shapes, depths, and orientations of an embossed area are also contemplated to provide desired flexibility of the flexible hinge 106.

FIG. 11 depicts a cross section taken along an axis 1100 of FIGS. 2 and 8 showing the magnetic coupling device 204 as well as a cross section of the cavity 904 of the computing device 102 in greater detail. In this example, a magnet of the magnetic coupling device 204 is illustrated as disposed within the connection portion 202.

Movement of the connection portion 202 and the channel 904 together may cause the magnet 1102 to be attracted to a magnet 1104 of a magnetic coupling device 1106 of the computing device 102, which in this example is disposed within the channel 904 of a housing of the computing device 102. In one or more implementations, flexibility of the flexible hinge 106 may cause the connection portion 202 to “snap into” the channel 904. Further, this may also cause the connection portion 202 to “line up” with the channel 904, such that the mechanical coupling protrusion 208 is aligned for insertion into the cavity 1002 and the communication contacts 208 are aligned with respective contacts 910 in the channel.

The magnetic coupling devices 204, 1106 may be configured in a variety of ways. For example, the magnetic coupling device 204 may employ a backing 1108 (e.g., such as steel) to cause a magnetic field generated by the magnet 1102 to extend outward away from the backing 1108. Thus, a range of the magnetic field generated by the magnet 1102 may be extended. A variety of other configurations may also be employed by the magnetic coupling device 204, 1106, examples of which are described and shown in relation to the following referenced figure.

FIG. 12 depicts an example 1200 of a magnetic coupling portion that may be employed by the input device 104 or computing device 102 to implement a flux fountain. In this example, alignment of a magnet field is indicted for each of a plurality of magnets using arrows.

A first magnet 1202 is disposed in the magnetic coupling device having a magnetic field aligned along an axis. Second and third magnets 1204, 1206 are disposed on opposing sides of the first magnet 1202. The alignment of the respective magnetic fields of the second and third magnets 1204, 1206 is substantially perpendicular to the axis of the first magnet 1202 and generally opposed each other.

In this case, the magnetic fields of the second and third magnets are aimed towards the first magnet 1202. This causes the magnetic field of the first magnet 1202 to extend further along the indicated axis, thereby increasing a range of the magnetic field of the first magnet 1202.

The effect may be further extended using fourth and fifth magnets 1208, 1210. In this example, the fourth and fifth magnets 1208, 1210 have magnetic fields that are aligned as substantially opposite to the magnetic field of the first magnet 1202. Further, the second magnet 1204 is disposed between the fourth magnet 1208 and the first magnet 1202. The third magnet 1206 is disposed between the first magnet 1202 and the fifth magnet 1210. Thus, the magnetic fields of the fourth and fifth magnets 1208, 1210 may also be caused to extend further along their respective axes which may further increase the strength of these magnets as well as other magnets in the collection. This arrangement of five magnets is suitable to form a flux fountain. Although five magnets were described, any odd number of magnets of five and greater may repeat this relationship to form flux fountains of even greater strength.

To magnetically attach to another magnetic coupling device, a similar arrangement of magnets may be disposed “on top” or “below” of the illustrated arrangement, e.g., so the magnetic fields of the first, fourth and fifth magnets 1202, 1208, 1210 are aligned with corresponding magnets above or below those magnets. Further, in the illustrated example, the strength of the first, fourth, and fifth magnets 1202, 1208, 1210 is stronger than the second and third magnets 1204, 1206, although other implementations are also contemplated. Another example of a flux fountain is described in relation to the following discussion of the figure.

FIG. 13 depicts an example 1300 of a magnetic coupling portion that may be employed by the input device 104 or computing device 102 to implement a flux fountain. In this example, alignment of a magnet field is also indicted for each of a plurality of magnets using arrows.

Like the example 1200 of FIG. 12, a first magnet 1302 is disposed in the magnetic coupling device having a magnetic field aligned along an axis. Second and third magnets 1304, 1306 are disposed on opposing sides of the first magnet 1302. The alignment of the magnetic fields of the second and third magnets 1304, 1306 are substantially perpendicular the axis of the first magnet 1302 and generally opposed each other like the example 1200 of FIG. 12.

In this case, the magnetic fields of the second and third magnets are aimed towards the first magnet 1302. This causes the magnetic field of the first magnet 1302 to extend further along the indicated axis, thereby increasing a range of the magnetic field of the first magnet 1302.

This effect may be further extended using fourth and fifth magnets 1308, 1310. In this example, the fourth magnet 1308 has a magnetic field that is aligned as substantially opposite to the magnetic field of the first magnet 1302. The fifth magnet 1310 has a magnetic field that is aligned as substantially corresponding to the magnet field of the second magnet 1304 and is substantially opposite to the magnetic field of the third magnet 1306. The fourth magnet 1308 is disposed between the third and fifth magnets 1306, 1310 in the magnetic coupling device.

This arrangement of five magnets is suitable to form a flux fountain. Although five magnets are described, any odd number of magnets of five and greater may repeat this relationship to form flux fountains of even greater strength. Thus, the magnetic fields of the first 1302 and fourth magnet 1308 may also be caused to extend further along its axis which may further increase the strength of this magnet.

To magnetically attach to another magnetic coupling device, a similar arrangement of magnets may be disposed “on top” or “below” of the illustrated arrangement, e.g., so the magnetic fields of the first and fourth magnets 1302, 1308 are aligned with corresponding magnets above or below those magnets. Further, in the illustrated example, the strength of the first and fourth magnets 1302, 1308 (individually) is stronger than a strength of the second, third and fifth magnets 1304, 1306, 1310, although other implementations are also contemplated.

Further, the example 1200 of FIG. 12, using similar sizes of magnets, may have increased magnetic coupling as opposed to the example 1300 of FIG. 13. For instance, the example 1200 of FIG. 12 uses three magnets (e.g. the first, fourth, and fifth magnets 1202, 1208, 1210) to primarily provide the magnetic coupling, with two magnets used to “steer” the magnetic fields of those magnets, e.g., the second and third magnets 1204, 1206. However, the example 1300 of FIG. 13 uses two magnets (e.g., the first and fourth magnets 1302, 1308) to primarily provide the magnetic coupling, with three magnets used to “steer” the magnetic fields of those magnets, e.g., the second, third, and fifth magnets 1304, 1306, 1308.

Accordingly, though, the example 1300 of FIG. 13, using similar sizes of magnets, may have increased magnetic alignment capabilities as opposed to the example 1200 of FIG. 12. For instance, the example 1300 of FIG. 13 uses three magnets (e.g. the second, third, and fifth magnets 1304, 1306, 1310) to “steer” the magnetic fields of the first and fourth magnets 1302, 1308, which are used to provide primary magnetic coupling. Therefore, the alignment of the fields of the magnets in the example 1300 of FIG. 13 may be closer than the alignment of the example 1200 of FIG. 12.

Regardless of the technique employed, it should be readily apparent that the “steering” or “aiming” of the magnetic fields described may be used to increase an effective range of the magnets, e.g., in comparison with the use of the magnets having similar strengths by themselves in a conventional aligned state. In one or more implementations, this causes an increase from a few millimeters using an amount of magnetic material to a few centimeters using the same amount of magnetic material.

FIG. 14 depicts a cross section taken along an axis 1400 of FIGS. 2 and 8 showing the mechanical coupling protrusion 208 as well as a cross section of the cavity 904 of the computing device 102 in greater detail. As before, the projection 902 and channel 904 are configured to have complementary sizes and shapes to limit movement of the connection portion 202 with respect to the computing device 102.

In this example, the projection 902 of the connection portion 202 also includes disposed thereon the mechanical coupling protrusion 208 that is configured to be received in a complementary cavity 1402 disposed within the channel 904. The cavity 1402, for instance, may be configured to receive the protrusion 1002 when configured as a substantially oval post as shown in FIG. 8, although other examples are also contemplated.

When a force is applied that coincides with a longitudinal axis that follows the height of the mechanical coupling protrusion 208 and the depth of the cavity 1002, a user overcomes the magnetic coupling force applied by the magnets solely to separate the input device 104 from the computing device 102. However, when a force is applied along another axis (i.e., at other angles) the mechanical coupling protrusion 208 is configured to mechanically bind within the cavity 1002. This creates a mechanical force to resist removal of the input device 104 from the computing device 102 in addition to the magnetic force of the magnetic coupling devices 204, 206.

In this way, the mechanical coupling protrusion 208 may bias the removal of the input device 104 from the computing device 102 to mimic tearing a page from a book and restrict other attempts to separate the devices. Referring again to FIG. 1, a user may grasp the input device 104 with one hand and the computing device 102 with another and pull the devices generally away from each other while in this relatively “flat” orientation. Through bending of the flexible hinge 106 the protrusion 208 and an axis of the cavity 1402 may be generally aligned to permit removal.

However, at other orientations, such as those shown in FIGS. 3-7, sides of the protrusion 208 may bind against sides of the cavity 1402, thereby restricting removal and promoting a secure connection between the devices. The protrusion 208 and cavity 1402 may be oriented in relation to each other in a variety of other ways as described to promote removal along a desired axis and promote a secure connection along other axes without departing from the spirit and scope thereof. The protrusion 208 may also be leveraged to provide a variety of other functionality besides mechanical retention, examples of which are discussed in relation to the following figures.

FIG. 15 depicts a perspective view 1500 of the protrusion as configured to communicate signals and/or transmit power between the input device 104 and the computing device 102. In this example, a top surface 1502 of the protrusion is configured to communicatively connect with a contact disposed within a cavity 1402 of the computing device 1402, or vice versa.

This contact may be used for a variety of purposes, such as to transmit power from the computing device 102 to the input device 104, from auxiliary power of the input device 104 to the computing device, communicate signals (e.g., signals generated from the keys of the keyboard), and so forth. Further, as shown in the top view 1600 of FIG. 16, the surface 1502 may be divided to support a plurality of different contacts, such as first and second contacts 1602, 1604 although other numbers, shapes, and sizes are also contemplated.

FIG. 17 depicts a cross section view 1700 of the protrusion 208 of FIG. 16 as disposed within the cavity 1402 of the computing device 102. In this example, first and second contacts 1702, 1704 include spring features to bias the contacts outward from the cavity 1402. The first and second contacts 1702, 1704 are configured to contact the first and second contacts 1602, 1602 of the protrusion, respectively. Further, the first contact 1702 is configured as a ground that is configured to contact the first contact 1602 of the protrusion 208 before the second contact 1704 touches the second contact 1604 of the protrusion 208. In this way, the input device 104 and the computing device 102 may be protected against electrical shorts. A variety of other examples are also contemplated without departing from the spirit and scope thereof.

FIG. 18 depicts an example implementation 1800 showing a support layer 1802 that is configured to support operation of the flexible hinge 106 as well as protect components of the input device 104 during this operation. As shown in relation to FIGS. 3-7, the flexible hinge 106 may be configured to support various degrees of bending to assume the different configurations.

However, materials chosen to form the flexible hinge 106, such as to form the first and second outer layers 916, 918 of the flexible hinge 106 may be chosen to support a desired “look and feel” and therefore may not provide desired resiliency against tearing and stretching. Therefore, in such an instance this could have an effect on operability of the conductors 912. For example, as previously described a user may grasp the input device 104 with one hand to pull it away from the computing device 102 by disengaging the protrusions 208 and magnetic attraction supported by the magnets. Therefore, this could result in an amount of force being applied to the conductors that is sufficient to break them absent sufficient support from the first or second outer surfaces 916, 918 or other structure.

Accordingly, the input device 104 may include a support layer 804 that may be configured to protect the flexible hinge 106 and other components of the input device 104. For example, the support layer 804 may be formed of a material that has a higher resistance to tearing and stretching than a material used to form the first or second outer layers 916, 918, e.g., biaxially-oriented polyethylene terephthalate (BoPET) which is also known as Mylar.

Support provided by the support layer 1802 may thus help protect the material used to form the first and second outer surfaces 916, 918 of the flexible hinge 106. The support layer 1802 may also help protect components disposed through the hinge, such as the conductors 912 used to communicatively couple the connection portion 202 with the keys.

In the illustrated example, the support layer 1802 includes a portion 1804 configured to be disposed as part of the input portion 914 of the input device 104 that includes the keys, track pad, and so on as shown in FIG. 1. The support layer 1802 also includes first and second tabs 1806, 1808 that are configured to extend from the portion 1804 through the flexible hinge 106 to be secured to the connection portion 202. The tabs may be secured in a variety of ways, such as to include one or more holes as illustrated through which a protrusion (e.g., screw, pin, and so on) may be inserted to secure the tabs to the connection portion 202.

The first and second tabs 1806, 1808 are illustrated in this example as being configured to connect at approximate opposing ends of the connection portion 202. In this way, undesirable rotational movement may be restricted, e.g., that is perpendicular to a longitudinal axis defined by the connection portion 202. Thus, the conductors 912 disposed at a relative midpoint of the flexible hinge 106 and connection portion 202 may also be protected from tearing, stretching, and other forces

The support layer 1802 in this illustrated example also includes a mid-spine portion 18010 that is configured to form part of the mid-spine 920 that is described in relation to FIGS. 9 and 10. Thus, the support layer 1802 may also act to increase the mechanical stiffness of the mid-spine 920 and contribute to the minimum bend radius as also previously described. Although first and second tabs 1806, 1808 are illustrated, it should be readily apparent that more or fewer tabs may also be employed by the support layer 1802 to support the functionality described.

FIG. 19 depicts an example implementation 1900 in which a top view of the connection portion 202 is shown. The connection portion 202 may be configured in a variety of ways and from a variety of materials, such as metals, plastics, and so on. These different materials may be chosen based on desired functionality.

For example, a designer may desire ease of insertion and removal of the connection portion 202 from the cavity of the computing device 102 and accordingly select a material that is smooth and that has a relatively high resistance to wear. However, such a material may not provide a desired resistance to flexing, which could cause inconsistent contact between portions of the connection portion 202 with the computing device 102. Accordingly, a designer may choose to utilize a plurality of pins at first, second, third, and fourth locations 1902, 1904, 1906, and 1908 along a longitudinal axis of the connection portion 202 to provide the desired stiffness.

FIG. 20 depicts a cross section view 2000 of the connection portion 202 of FIG. 19. As illustrated, first, second, third, and fourth pins 2002, 2004, 2006, 2008 are utilize to secure a metal spine 2010 in this example to a plastic 2012 used to form a top surface of the connection portion 202. In this way, the pins in combination with the spine 2010 and plastic 2012 may form a laminate structure that is resistant to bending, e.g., along an axis perpendicular to a surface of the spine 2010 and the heights of the pins. It should be readily apparent that a wide range in the numbers and locations of the pins is contemplated, the previous discussion just one example thereof

The use of the pins may also support a variety of other functionality. For example, the laminate structure may also be supported through use of an adhesive between the metal spine 2010 and the plastic 2012. The adhesive, however, may have an amount of time to cure before it is effective. Through use of the pins, however, the adhesive may be applied and then the pins inserted to secure the metal spine 2010 to the plastic 2012 during curing, thereby increasing speed of manufacturing and efficiency. The pins may be configured in a variety of ways, an example of which is described in relation to the following figure.

FIG. 21 depicts an example cross sectional view of the first pin 2002 of FIG. 20 as securing the metal spine 2010 to the plastic of the connection portion 202. In this example, the first pin 2002 is configured to include self-clinching functionality such that the pin may be secured within a relatively thin material, such as a piece of sheet metal. In this way, the metal spine 2010 may cause a pressure to be applied against a head 2102 of the pin 2102 to secure the first pin 2002 to the metal spine 2010.

The first pin 2002 may also include a barrel 2104 that is secured within the plastic 2104. Therefore, the first pin 2002 may be pressed through an appropriate sized hole in the metal spine 2010 to cause the metal spine 2102 to self-clinch as well as the barrel 2104 to be secured within the plastic 2012. A variety of other types and configurations of pins may be utilized, such as screws, rivets, and so on.

Example System and Device

FIG. 22 illustrates an example system generally at 2200 that includes an example computing device 2202 that is representative of one or more computing systems and/or devices that may implement the various techniques described herein. The computing device 2202 may be, for example, be configured to assume a mobile configuration through use of a housing formed and size to be grasped and carried by one or more hands of a user, illustrated examples of which include a mobile phone, mobile game and music device, and tablet computer although other examples are also contemplated.

The example computing device 2202 as illustrated includes a processing system 2204, one or more computer-readable media 2206, and one or more I/O interface 2208 that are communicatively coupled, one to another. Although not shown, the computing device 2202 may further include a system bus or other data and command transfer system that couples the various components, one to another. A system bus can include any one or combination of different bus structures, such as a memory bus or memory controller, a peripheral bus, a universal serial bus, and/or a processor or local bus that utilizes any of a variety of bus architectures. A variety of other examples are also contemplated, such as control and data lines.

The processing system 2204 is representative of functionality to perform one or more operations using hardware. Accordingly, the processing system 2204 is illustrated as including hardware element 2210 that may be configured as processors, functional blocks, and so forth. This may include implementation in hardware as an application specific integrated circuit or other logic device formed using one or more semiconductors. The hardware elements 2210 are not limited by the materials from which they are formed or the processing mechanisms employed therein. For example, processors may be comprised of semiconductor(s) and/or transistors (e.g., electronic integrated circuits (ICs)). In such a context, processor-executable instructions may be electronically-executable instructions.

The computer-readable storage media 2206 is illustrated as including memory/storage 2212. The memory/storage 2212 represents memory/storage capacity associated with one or more computer-readable media. The memory/storage component 2212 may include volatile media (such as random access memory (RAM)) and/or nonvolatile media (such as read only memory (ROM), Flash memory, optical disks, magnetic disks, and so forth). The memory/storage component 2212 may include fixed media (e.g., RAM, ROM, a fixed hard drive, and so on) as well as removable media (e.g., Flash memory, a removable hard drive, an optical disc, and so forth). The computer-readable media 2206 may be configured in a variety of other ways as further described below.

Input/output interface(s) 2208 are representative of functionality to allow a user to enter commands and information to computing device 2202, and also allow information to be presented to the user and/or other components or devices using various input/output devices. Examples of input devices include a keyboard, a cursor control device (e.g., a mouse), a microphone, a scanner, touch functionality (e.g., capacitive or other sensors that are configured to detect physical touch), a camera (e.g., which may employ visible or non-visible wavelengths such as infrared frequencies to recognize movement as gestures that do not involve touch), and so forth. Examples of output devices include a display device (e.g., a monitor or projector), speakers, a printer, a network card, tactile-response device, and so forth. Thus, the computing device 2202 may be configured in a variety of ways to support user interaction.

The computing device 2202 is further illustrated as being communicatively and physically coupled to an input device 2214 that is physically and communicatively removable from the computing device 2202. In this way, a variety of different input devices may be coupled to the computing device 2202 having a wide variety of configurations to support a wide variety of functionality. In this example, the input device 2214 includes one or more keys 2216, which may be configured as pressure sensitive keys, mechanically switched keys, and so forth.

The input device 2214 is further illustrated as include one or more modules 2218 that may be configured to support a variety of functionality. The one or more modules 2218, for instance, may be configured to process analog and/or digital signals received from the keys 2216 to determine whether a keystroke was intended, determine whether an input is indicative of resting pressure, support authentication of the input device 2214 for operation with the computing device 2202, and so on.

Various techniques may be described herein in the general context of software, hardware elements, or program modules. Generally, such modules include routines, programs, objects, elements, components, data structures, and so forth that perform particular tasks or implement particular abstract data types. The terms “module,” “functionality,” and “component” as used herein generally represent software, firmware, hardware, or a combination thereof. The features of the techniques described herein are platform-independent, meaning that the techniques may be implemented on a variety of commercial computing platforms having a variety of processors.

An implementation of the described modules and techniques may be stored on or transmitted across some form of computer-readable media. The computer-readable media may include a variety of media that may be accessed by the computing device 2202. By way of example, and not limitation, computer-readable media may include “computer-readable storage media” and “computer-readable signal media.”

“Computer-readable storage media” may refer to media and/or devices that enable persistent and/or non-transitory storage of information in contrast to mere signal transmission, carrier waves, or signals per se. Thus, computer-readable storage media refers to non-signal bearing media. The computer-readable storage media includes hardware such as volatile and non-volatile, removable and non-removable media and/or storage devices implemented in a method or technology suitable for storage of information such as computer readable instructions, data structures, program modules, logic elements/circuits, or other data. Examples of computer-readable storage media may include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical storage, hard disks, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or other storage device, tangible media, or article of manufacture suitable to store the desired information and which may be accessed by a computer.

“Computer-readable signal media” may refer to a signal-bearing medium that is configured to transmit instructions to the hardware of the computing device 2202, such as via a network. Signal media typically may embody computer readable instructions, data structures, program modules, or other data in a modulated data signal, such as carrier waves, data signals, or other transport mechanism. Signal media also include any information delivery media. The term “modulated data signal” means a signal that has one or more of its characteristics set or changed in such a manner as to encode information in the signal. By way of example, and not limitation, communication media include wired media such as a wired network or direct-wired connection, and wireless media such as acoustic, RF, infrared, and other wireless media.

As previously described, hardware elements 2210 and computer-readable media 2206 are representative of modules, programmable device logic and/or fixed device logic implemented in a hardware form that may be employed in some embodiments to implement at least some aspects of the techniques described herein, such as to perform one or more instructions. Hardware may include components of an integrated circuit or on-chip system, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), a complex programmable logic device (CPLD), and other implementations in silicon or other hardware. In this context, hardware may operate as a processing device that performs program tasks defined by instructions and/or logic embodied by the hardware as well as a hardware utilized to store instructions for execution, e.g., the computer-readable storage media described previously.

Combinations of the foregoing may also be employed to implement various techniques described herein. Accordingly, software, hardware, or executable modules may be implemented as one or more instructions and/or logic embodied on some form of computer-readable storage media and/or by one or more hardware elements 2210. The computing device 2202 may be configured to implement particular instructions and/or functions corresponding to the software and/or hardware modules. Accordingly, implementation of a module that is executable by the computing device 2202 as software may be achieved at least partially in hardware, e.g., through use of computer-readable storage media and/or hardware elements 2210 of the processing system 2204. The instructions and/or functions may be executable/operable by one or more articles of manufacture (for example, one or more computing devices 2202 and/or processing systems 2204) to implement techniques, modules, and examples described herein.

CONCLUSION

Although the example implementations have been described in language specific to structural features and/or methodological acts, it is to be understood that the implementations defined in the appended claims is not necessarily limited to the specific features or acts described. Rather, the specific features and acts are disclosed as example forms of implementing the claimed features. 

What is claimed is:
 1. An input device comprising: an input portion comprising a plurality of keys that are configured to generate signals to be processed by a computing device as inputs; a connection portion comprising: at least one communication contact configured to form a communicative coupling with the computing device to communicate the generated signals; and a magnetic coupling device to form a removable magnetic attachment to the computing device; and a flexible hinge that is configured to flexibly connect the connection portion to the input portion, the flexible hinge having: one or more conductors configured to communicatively couple the keys with the communication contact; and a mid-spine configured to supply mechanical stiffness to a location of the flexible hinge that includes the mid-spine.
 2. An input device as described in claim 1, wherein the flexible hinge is configured not to exceed a minimum bend radius that is defined at least in part based on flexibility of the one or more conductors to communicatively couple the connection portion with the plurality of keys.
 3. An input device as described in claim 1, wherein the flexible hinge is flexible in an amount that is sufficient to orient the input device in: a first orientation with respect to the computing device to cover at least a portion of a display device of the computing device; and a second orientation with respect to the computing device to cover at least a rear portion of a housing of the computing device that is opposite of a side of the housing that includes the display device.
 4. An input device as described in claim 1, wherein the connection portion is configured as a projection that is configured to be received within a channel of a housing the computing device, the projection including the at least one communication contact and the magnetic coupling device.
 5. An input device as described in claim 4, wherein: the at least one communication contact is located at an approximate midpoint of the projection along a longitudinal axis of the projection; and at least a portion of the conductor is located at a corresponding approximate midpoint of the flexible hinge.
 6. An input device as described in claim 1, wherein the flexible hinge includes the mid spine, a first flexible portion that flexibly connects the input portion with the mid-spine, and a second flexible portion that flexibly connects the mid spine to the connection portion.
 7. An input device as described in claim 6, wherein the mid spine is configured to provide the mechanical stiffness, which is greater than a mechanical stiffness of the first and second flexible portions.
 8. An input device as described in claim 1, wherein the mid-spine of the flexible hinge is configured to permit rotational movement of the input device in relation to the computing device that mimics a cover of a book along a first axis and restricts movement of the input device in relation to the computing device along a second axis that is substantially perpendicular to the first axis.
 9. An input device as described in claim 1, wherein the plurality of keys forms a QWERTY keyboard.
 10. An input device as described in claim 1, wherein the flexible hinge is configured to permit the input device to be positioned to cover a display device of the computing device and a rear portion of a housing of the computing device.
 11. An input device comprising: an input portion configured to generate signals to be processed by a computing device as inputs; a connection portion comprising: at least one communication contact configured to form a communicative coupling with the computing device to communicate the generated signals; and a magnetic coupling device to form a removable magnetic attachment to the computing device; and a flexible hinge that is configured to flexibly connect the connection portion to the input portion, the flexible hinge including a mid-spine that is configured to provide mechanical stiffness such that flexibility of the flexible hinge does not exceed a minimum bend radius that is defined at least in part based on an operational flexibility of the conductors to communicatively couple the connection portion with the input portion.
 12. An input device as described in claim 11, wherein the minimum bend radius that is defined at least in part based on an operational flexibility of the conductors to communicatively couple the connection portion with the plurality of keys after repeated flexing of the flexible hinge.
 13. An input device as described in claim 11, wherein the flexible hinge is configured not to exceed the minimum bend radius through inclusion of the mid spine, a first flexible portion that flexible connects the input portion with the mid spine, and a second flexible portion that flexible connects the mid spine to the connection portion.
 14. An input device as described in claim 13, wherein the mid spine is configured to provide a mechanical stiffness greater than a mechanical stiffness of the first and second flexible portions.
 15. An input device as described in claim 11, wherein the connection portion is configured as a projection that is configured to be received within a channel of a housing the computing device, the projection including the at least one communication contact and the magnetic coupling device.
 16. An input device as described in claim 11, wherein: the at least one communication contact is located at an approximate midpoint of the projection; and at least a portion of the conductor is located at an approximate midpoint of the flexible hinge.
 17. An input device comprising: an input portion configured to generate signals to be processing by a computing device as inputs; a connection portion that is configured to be removably attachable to the computing device and includes at least one communication contact configured to form a communicative coupling with the computing device to communicate the generated signals; and a flexible hinge that is configured to flexibly and communicatively connect the connection portion to the input portion, the flexible hinge including a mid-spine configured to provide mechanical stiffness to the flexible hinge such that the flexible hinge is flexible in an amount that is sufficient to: permit movement along a first axis to orient the input device in a first orientation with respect to the computing device to cover at least a portion of a display device of the computing device and a second orientation with respect to the computing device to cover at least a rear portion of a housing of the computing device that is opposite of a side of the housing that includes the display device; and restrict movement along a second axis that is substantially perpendicular to the first axis.
 18. An input device as described in claim 17, wherein the connection portion includes a magnetic coupling device to form a removable magnetic attachment to the computing device.
 19. An input device as described in claim 17, wherein the mid-spine of the flexible hinge is configured to provide the mechanical stiffness such that flexibility of the flexible hinge does not exceed a minimum bend radius that is defined at least in part based on an operational flexibility of conductors that are configured to communicatively couple the connection portion with the input portion.
 20. An input device as described in claim 17, wherein the flexible hinge is configured to permit the input device to be positioned to cover a display device of the computing device and a rear portion of a housing of the computing device. 